O Clavis David (O Key of David) O Key of David, and Scepter of the House of Israel, who opens and no one shuts, who shuts and no one opens; Come and release the captives from their prison, they who sit in darkness and in the shadow of death.

O Clavis David, et sceptrum domus Israël, qui aperis, et nemo claudit, claudis, et nemo aperuit: veni, et educ vinctum de domo carceris, sedentem in tenebris, et umbra mortis.

“For a child has been born for us,
   a son given to us;
authority rests upon his shoulders;
   and he is named
Wonderful Counsellor, Mighty God,
   Everlasting Father, Prince of Peace. 
I will place on his shoulder the key of the house of David; he shall open, and no one shall shut; he shall shut, and no one shall open.”


– Isaiah 9:6; 22:22